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(No Model.) 4 Sheets-Sheet 2.

O. HERTRAMPF.

ANNULAR KILN FOR MANUFACTURING BRICKS.

No. 365,997. Patented July 5, 1887.

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(No Model.) 4 Sheets-Sheet 3.

0. HERTRAMPF.

ANNULAR KILN FOR MANUFACTURING BRICKS.

No. 365,997. Patented July 5, 1887.

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' PATENT tries.

OTTO HERTRAMPF, OF BRESLAU, GERMANY.

ANNULAR KILN FOR MANUFACTURING BRICKS.

SPECIFICATION forming part of Letters Patent No. 365,997, dated July 5, 1887.

Application filed October 31', 1885. Serial No. 181,462.

(No model.) Patented in Germany June 10, 1883, No. 26,362,:ind Mayo,

1885, No. 34,239; in France June 23, 1885, No. 109,712; in England July 25, 1885, No. 8,989; in Belgium January 27, 1886, No. 52,922, and in Austria-Hungary October 14, 1886, No. 15,268 and No. 45,840.

To aZZ whom, it may concern,-

Be it known that LOTTO HERTRAMrnof the city of Breslau, in the Kingdom of Prussia and German Empire, have invented certain new and useful Improvements in Annular Kilns for Manufacturing Bricks, of which the following is a specification.

In order to sufficiently dry the raw material before burning that is to say, to evaporate the water in the material sufficiently without using additional fuel therefor-it has hitherto been the custom to conduct the heat remaining in the chamber by systems of piping into the drying-chamber before the fire; but this heat is insufficient for the purpose of effi cient drying.

A suitable heat is obtained by this invention in the following manner, reference being had to the accompanying drawings, in which Figure I is an enlarged vertical section, and Figs. 11', III, and IV are horizontal sections, of my invention.

In each single chamber cylindrical pipes of chamotte stones at a and slots 1) are fitted in the longitudinal sides. The latter run in each chamber alternatelyin horizontal and vertical directions, and are faced toward the sides of the chamber. The pipes a and slots 6 are in connection beneath with the horizontal fiues c, c, and c, and above by the connecting-fines g with the heat-conducting flues e c. The lower flue system consists of the chamber 0, lying one above the other in the walls of the fines, and such dues are connected with each other, and are also connected on the one side with the outer air and on the other side by means of the connecting-flue c" and the branch flues c with the pipes a and slots 1). a and b discharge into the ilues g, and these in their turn into the heat-conducting ilues c. From the fine a there branches off the flue system i, and from this the fire-feeding holes is lead down into the different chambers.

In order to regulate the supply of air ac cording to requirement, the different dues are connected with each other by valves in the following manner: flues c and c by valves (1, lines 1 and c by valves f, and lines 11 and c by valves h.

The method of working is as follows; By

means of the outgoing heated gases, which pass from the'furnace to the main flue, the fines 0 become greatly hcated,and thereby heat the air entering into them from'ontside. When so heated, the valve (Z of the fire-chamber is opened, so that the heated air can enter the pipes a and slots I) of this chamber from the flues 0 through the connecting-fines c" and the branch fines o Here the air receives addit-ional heat from the surfaces of the pipes and slots. The valves f are then opened, and thereby the heated air is led from a and b through the connecting-fines 9 into the heatconducting fines 6. Finally, the valve h of the drying-chamber and the valve Z are simultaneously opened, whereby the hot air is led from the fine 0 into the branch ilues i, and through the fire-holes 7c into the drying-chamber, from where it flows over the raw material, and finally passes away with the outgoing water-vapors through the flue Zto the main flue m. By these means sufficient heat is ob tained to dry the raw material thoroughly.

In addition to the foregoing, another arrangement for drying may be fitted. Over the ordinary furnace is a covered stirring-chamber, K,cntirely surrounded by briekwork, as usual. Into this chamber heat is conducted in the following manner, in order to dry the raw material placed therein: Besides the heat-conducting line i in the surrounding wall of the furnace there is another flue,n, fitted,which is con neeted on the one side by valves 0 with the fluesg 1 and on the other side by valves 1) with the outlet-channels q. After the drying has taken place, the valves f are closed and the valves 0 are opened, so that the hot air still remaining in a, b, and g of the fire-chamber, instead of entering the flue 0, passes into theflue n. Then the valve p, placed in the required position, is opened, so that the hot air can escape by the corresponding outlet-flue q to the stirringchamber K and to the raw material to be dried. At the end of each chamber sliding doors 1' r are fitted in the heat-conducting flues c, and by means of opening or closing these doors 9' r the currents of heat can be led in any desired direction, as well as into each part of the stirring-chamber K.

In furnaces constructed according to my invention there is a saving of twenty-five per cent. in fuel and time compared with furnaces of the best-known systems. The raw material for bricks can be put in wet, and at the end of the operation taken out of the kiln free from cracks, without discoloration by smoke, and of an entirely uniform color. Ordinary furnaces can be adapted to this system in a short time without great expense.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is- In the construction of brick-kilns, the arrangement of the pipes a and slots 1) in the walls, connected beneath by flues c c 0 with the outer air, above by fines g with the heatcondnoting lines 6 and a, for the purpose of partially heating the outer air in the fines 0, parallel with the heat-collecting walls, afterward heating the same in the pipes on and slots 1) of the chamber, and of using the same in such a heated state for drying the raw mateterial, either by leading it from the heatconducting flue a through i and 70 into the drying-chamber, or from the heat-conducting pipe at through 12 and q into the stirring-furnace K, substantially as described, and shown in the accompanying drawings.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

. OTTO HERTRAMPF. Witnesses:

I-IERMANN J UNG, HENRY DITHMAR. 

